Correct!
In fact, most of the flavor is perceived through the olfactory system. Loss of the file olfactory or other neurons in the pathway due to head trauma or neurodegenerative disease may result in loss of the smelling sense, which in turn reduces the flavor of all foods to the above mentioned basic tastes.
No vanilla, no rosemary, no smoky flavor of your grilled whatever or your favorite whiskey ... you get the point.